From fictiondb:

Dating Bryan Falcon was only supposed to be a decoy, something for the tabloids to latch on to and run with. Still, Grace Pennington never expected to actually have feelings for the hard-core businessman. And although she'd simply promised her twin sister that she'd "date" Bryan until her sister's nuptials and then say goodbye, Grace sensed an attraction between herself and Bryan that was hard to deny. But were Bryan's signals for real, or was he doing an excellent job of playing the doting boyfriend? Either way, Grace knew that -- if she let him -- Bryan Falcon could invade parts of her life she had fiercely protected for years.

For that reason alone, they had to part ways, no strings attached -- and no broken hearts.... Or so she thought.